After spending a bit of time with the two "extra bass" headphones, here are my final thoughts between the two.  I hope you guys will find it useful.  If you missed the unboxing videos you can watch them here.   MDR-XB1000: http://www.youtube.com/watch?v=AREfsEf2cbs   MDR-XB700: http://www.youtube.com/watch?v=HP9K2PqK6rg   Comfort & Design: The XB700 has a much better seal on my head than the XB1000.  The seal is so good that it feels like wearing ear plugs.  Both headphones are VERY comfy to wear for hours, but I do...